Genius professor Ye Shiyu, while getting a mouse for her brother-in-law Hong Zhenhui, is unexpectedly pulled into the game world he created by a severely injured Pei Song. She saves Pei Song with her superb medical skills, only to realize she has traveled into the game and that he is her 2D idol.
After returning to reality, she discovers the game is updating on its own and learns that Hong Zhenhui plans to kill the main character, Pei Song, to end the game. Ye Shiyu travels back and forth to save Pei Song, and feelings develop between them amidst their entanglement. She figures out that taking a photo together is the key to her return.
Pei Song travels to the real world through the mouse, learns he is a game character, confesses his love to Ye Shiyu, and confronts Hong Zhenhui. Assassin Sun Tengxing and villain Wang Shunfa cause successive troubles, while Hong Zhenhui switches sides, modifying the plot to frame Pei Song.
After experiencing time travel and life-and-death battles, Ye Shiyu is severely injured and falls into a vegetative state. Pei Song discovers the secret to traversing worlds, uses the game mouse and programming to save her, and they ultimately join forces to defea…
